The document proposes a concept called "Twitter for products" which would allow consumers to scan product barcodes with their smartphones and view or post comments about that product. It suggests building an international database of consumer opinions about products to help inform purchasing decisions. The document also discusses potential ways to monetize such a platform, including selling consumer comments and insights to manufacturers or data mining companies or using targeted ads. It raises the idea of integrating product information and reviews with mapping tools similarly to how Google Maps works with locations.